With this app you can easily calculate the needed amount of liquids, such as developer or fixer when developing films in a tank.

You can set up your tank needed chemical amounts per film type / reel type (such as 135 or 120 film). Also you can setup needed dilutions for developer and fixer.

This app calculates the needed liquid amounts for all.

Also there is a temperature mixer calculator with automatic solve. This can be used when for example your developer is hotter / colder than needed temperature; you can easily calculated needed water temperature to achieve the development temperature.